Crop Testing Analysis CAWELO WATER DISTRICT BAKERSFIELD, CA - - PowerPoint PPT Presentation

Crop Testing Analysis

CAWELO WATER DISTRICT BAKERSFIELD, CA OCTOBER 28, 2016

October 2016

1

Expert Engagement

Ana naly lytical tical Data: a:

• Amec Foster Wheeler Environmental & Infrastructure, Inc.
• Advanced Environmental Concepts, Inc.
• Weck Laboratories, Inc.
• Anresco Laboratories

Evaluati valuation:

• n:
• Dr. Heriberto Robles, Enviro-Tox Services, Inc.

October 2016

2

Credentials

Her eriber iberto

• Robl

bles, es, M.S. S., , Ph.D., .D., D.A.B.T .B.T.: .:

• 35 years experience in environmental toxicology and

human health and environmental risk assessment

• Certified by the American Board of Toxicology
• One of 3,125 in the world

Exper ertise: tise:

• Human and Occupational Toxicology
• Environmental Toxicology
• Human and Ecological Risk Assessment
• Environmental Chemical Fate and Transport

October 2016

3

Cawelo Water District

Mission sion to provide vide cl clea ean, n, safe e irr rriga gation tion water er:

• Serving Kern County for more than 50 years
• Provides irrigation water to 34,000 acres of orchards,

vineyards and other crops

• Working collaboratively with regulators to evaluate water

quality

• Monitored by the Central Valley Regional Water Quality

Control Board (Regional Board):

• Long history of compliance with the Regional Board
• Monthly testing and reporting for nearly 70 constituents
• Expanded quarterly testing and reporting for more than 160 constituents

October 2016

4

Decisions Based on Sound Science

Thoughtf

• ughtful

ul Di Dialogue logue Gu Guided ded by Facts: cts:

Study #1

• Initial water quality testing for approximately 70 constituents & analysis of

almonds, grapes and pistachios (presented April 2016) Study #2

• Testing of oranges, mandarins and lemons

Study #3

• Testing of carrots and potatoes

Study #4

• On June 17, 2016, the oil company submitted to the Regional Board a list
• f constituents used in the oil extraction process
• The expanded water quality testing of more than 160 constituents, based
• ff the oil company list, is now conducted and reported quarterly to the

Regional Board

October 2016

5

Snapshot of Current Scientific Facts

• Water quality testing for nearly 70 constituents presented

to the Food Safety Panel in April 2016

• Meets water quality goals for agricultural use
• Organic compounds either at or below levels considered

safe for drinking water (a higher standard than what is required for agricultural use)

• U.S. EPA Regional Screening Levels for tap water
• Cal/EPA Environmental Screening Levels

October 2016

6

Ini niti tial al Res esults ults Sh Show Rec ecycled cled Produced

• duced Water

er Su Supply ply Sa Safe e for r Irr rrigation: igation:

Snapshot of Current Scientific Facts

October 2016

7

Alm lmonds nds, , Gra rapes pes & Pis istachios: tachios:

• Analysis supports initial water quality findings; water safe

for agriculture irrigation

• Testing showed crops irrigated with produced water have

a similar chemical composition as foods grown with any

• ther water supply

New Citrus Crop Analysis

Mandar ndarin ins, s, Ora rang nges es & Le Lemo mons: ns:

October 2016

8

• Analysis supports initial water quality findings; water safe

for agriculture irrigation

• Utilized U.S. EPA testing protocols
• Nine constituents identified from water quality study
• Tested for: acetone, benzene, toluene, ethylbenzene,

xylenes, acenaphthene, fluorene, naphthalene and phenanthrene

New Citrus Crop Analysis

Mandar ndarin ins, s, Ora rang nges es & Le Lemo mons: ns:

October 2016

9

• Nine constituents either not found or found at similar

concentrations in both Test and Control samples

• Results indicate organic constituents are not being

absorbed nor accumulated in edible fruit

• Test and Control samples collected from eighteen

different sampling locations on Feb. 16 and 17, 2016

• Re-test date March 23, 2016, fruit and dust samples
• Ongoing testing recommended

New Root Crop Analysis Summary

Carr rrots ts & Potat atoes:

• es:

October 2016

10

• Analysis supports initial water quality findings; water safe for

agriculture irrigation

• Acetone detected in Test and Control samples at extremely low

levels, indicating it is a naturally occurring substance

• Preliminary results show organic constituents are not being

absorbed nor accumulated in the roots of plants

• Nine constituents identified from water quality study
• Tested for: acetone, benzene, toluene, ethylbenzene, xylenes,

acenaphthene, fluorene, naphthalene and phenanthrene

• Final report expected to be released in November 2016

Expanded Water Quality Testing

Qua uarterly erly Tes esti ting ng for r 160+ + Consti nstitue tuents: nts:

October 2016

11

• On June 17, 2016, the oil company submitted to the Regional

Board a list of constituents used in the oil extraction process

• In August 2016, Cawelo submitted expanded water quality

data, as required by the Regional Board to test for more than 160 constituents

• Systematically moving through review process of expanded

testing data

• To date, vast majority have been non-detectable or below

drinking water quality standards – an even higher standard than required

• Expanded testing

Expanded Water Quality Testing

Qua uarterly erly Tes esting ting for r 160+ + Consti nstitue tuents: nts:

October 2016

12

• Detected

Compounds June and September 2016 Maximum Detected Concentration (ug/L) Does Maximum Detected Concentration Exceed Drinking Water Screening Levels

• r

MCLs? Volatile Organic Compounds

• 1,2,4-Trimethylbenzene

2.4 No 1,2-Dichloropropane 0.19 No Chloroform 0.21 No Ethylbenzene 0.65 No Methanol 860 No n-Propylbenzene 0.23 No Toluene 0.42 No Xylenes 2.3 No Semi Volatile Organic Compounds

• Acenaphthene

0.53 No Fluorene 0.37 No Naphthalene 0.11 No Phenanthrene 0.22 No Petroleum Hydrocarbons

• Kerosene

620 No

Note: MCLs=Maximum contaminant levels Ug/L=Micrograms per liter

Next Steps

• All data available on website
• Ongoing voluntary crop

sampling continues

October 2016

13

Coll llaboration aboration with h Reg egional

• nal Board: